Hostname: page-component-5cf477f64f-54txb Total loading time: 0 Render date: 2025-04-04T10:13:14.126Z Has data issue: false hasContentIssue false
  • English
  • Français

Stability of I and SR Radiophases in Cement Matrices

Published online by Cambridge University Press:  15 February 2011

M.W. Barnes ,
B.E. Scheetz ,
L.D. Wakeley ,
S.D. Atkinson  and
D.M. Roy
M.W. Barnes
Affiliation:
Materials Research Laboratory, The Pennsylvania State University, University Park, PA 16802
B.E. Scheetz
Affiliation:
Materials Research Laboratory, The Pennsylvania State University, University Park, PA 16802
L.D. Wakeley
Affiliation:
Materials Research Laboratory, The Pennsylvania State University, University Park, PA 16802
S.D. Atkinson
Affiliation:
Materials Research Laboratory, The Pennsylvania State University, University Park, PA 16802
D.M. Roy
Affiliation:
Materials Research Laboratory, The Pennsylvania State University, University Park, PA 16802
Get access

Abstract

The following study is a portion of a comprehensive research program that is examining the stability of a variety of nuclear waste forms. In addition to the bulk waste forms, important individual radiophases are being studied to obtain a more complete understanding of the behavior of the components of complex multiphase radwaste systems. The stability of the strontium radiophase in supercalcine and an iodine-radiophase will be discussed.

The strontium radiophase in this study was Sr-powellite and the iodine radiophase was I-sodalite. Each radiophase was incorporated into bulk compositionally adjusted portland and aluminate cements. Two processing variables were studied: curing at 60°C and warm pressing at 150°C and 345 MPa.

Sr-powellite in portland cement leaches incongruently; a combination of dissolution and diffusion-controlled exchange of Ca for Sr is demonstrated. In the warm-pressed aluminate cement these reactions are masked by reactions with the curing cement. I-sodalite leaching data indicate dissolution, dominant at long times, combined with diffusion, dominant at short times.

Type
Research Article
Information
MRS Online Proceedings Library (OPL) , Volume 6: Symposium D – Scientific Basis for Nuclear Waste Management IV , 1981 , 147
Copyright
Copyright © Materials Research Society 1982

Access options

Get access to the full version of this content by using one of the access options below. (Log in options will check for institutional or personal access. Content may require purchase if you do not have access.)

References

REFERENCES

1. Moore, J.G., “A Survey of Concrete Waste Forms” Alternate Nuclear Waste Forms and Interactions in Geologic Media, ORNL CONF–8005107, Gatlinburg, TN (May 13–15, 1980).Google Scholar
2. Roy, D.M., Scheetz, B.E., Wakeley, L.D. and Atkinson, S.D., “Low Temperature Ceramic Waste Forms: Characterization of Monazite Cement Composites,” Scientific Basis for Nuclear Waste Management, Vol. 2. Edited by Northrup, C.J.M. Jr., Plenum Press, NY, 1980.Google Scholar
3. Vance, E.R., Scheetz, B.E., Barnes, M.W. and Bodnar, B.J., “Studies of Pollucite,” this symposium.Google Scholar
4. Strachan, D.M. and Babad, H., “Iodide and Iodate Sodalites for the Long-Term Storage of Iodine–129,” Proc. Int. Symp., Comcommato, Ohio, April 30– May 2, 1979. Ceramics in Nuclear Waste Management CONF–790420 DOE (1979).Google Scholar
5. Vance, E.R., Agrawal, D.K., Scheetz, B.E., Pepin, J.G., Atkinson, S.D. and White, W.B., “Ceramic Phases for Immobilization of 129I,”, (1981), NTIS Report DOE/ET/41900–9 (ESG–DOE–13354).Google Scholar
6. Vance, E.R., Agrawal, D.K., and Pepin, J.G., “Powder X-ray Diffraction Study of Halide Sodalites,” Phys. Stat. Sol. (a) 63, K189 (1981).Google Scholar
7. International Atomic Energy Agency, Leach Testing of Immobilized Radioactive Waste Solids, A Proposal for a Standard Method, Hespe, E.D., Atomic Energy Rev. 9(1), pp. 195–207 (1971).Google Scholar
8. Roy, D.M., Scheetz, B.E., and Barnes, Mary W., “Preparation of Cement Composite Nuclear Waste Forms and Their Physical and Chemical Properties.” Materials Research Laboratory, The Pennsylvania State University Report PSU–021, to Rockwell Energy Systems Group, Canoga Park, CA.Google Scholar
9. Linke, W.F. (1965), “Seidell: Solubilities,” Vol. I, p. 614; Vol. II, p. 1508, American Chemical Society.Google Scholar